... Published in final edited form as: Heterocycles. 2009 Jun 19; 78(10): 10.3987/COM-09-11754. ... The structures of the new compounds were established primarily by spectroscopic data as quercetin 3-O-(2″-O-α-l-rhamnopyranosyl-6″-O-E-p-coumaroyl)-β-D-glucopyranoside (1 ...